Title : Facilitated nucleocytoplasmic shuttling of the Ran binding protein RanBP1.

Pub. Date : 2000 May

PMID : 10779340






5 Functional Relationships(s)
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1 We now show that RanBP1 accumulates in nuclei of cells treated with the export inhibitor, leptomycin B, and collapse of the nucleocytoplasmic Ran:GTP gradient leads to equilibration of RanBP1 across the nuclear envelope. Guanosine Triphosphate RAN binding protein 1 Homo sapiens
2 We now show that RanBP1 accumulates in nuclei of cells treated with the export inhibitor, leptomycin B, and collapse of the nucleocytoplasmic Ran:GTP gradient leads to equilibration of RanBP1 across the nuclear envelope. Guanosine Triphosphate RAN binding protein 1 Homo sapiens
3 In permeabilized cells, nuclear accumulation of GST-RanBP1(1-161) requires nuclear Ran:GTP but is not inhibited by a dominant interfering G19V mutant of Ran. Guanosine Triphosphate RAN binding protein 1 Homo sapiens
4 These data indicate that RanBP1 translocates through the pores by an active, nonclassical mechanism and requires Ran:GTP for nuclear accumulation. Guanosine Triphosphate RAN binding protein 1 Homo sapiens
5 Shuttling of RanBP1 may function to clear nuclear pores of Ran:GTP, to prevent premature release of import cargo from transport receptors. Guanosine Triphosphate RAN binding protein 1 Homo sapiens